Pith Number

pith:24CK2CAY

pith:2019:24CK2CAYPMD56ESDVSNIJUWQFN

not attested not anchored not stored refs pending

Varieties of planes on intersections of three quadrics

Brendan Hassett, Yuri Tschinkel

arxiv:1904.06313 v1 · 2019-04-12 · math.AG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{24CK2CAYPMD56ESDVSNIJUWQFN}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:48:43.621727Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf

Aliases

arxiv: 1904.06313 · arxiv_version: 1904.06313v1 · doi: 10.48550/arxiv.1904.06313 · pith_short_12: 24CK2CAYPMD5 · pith_short_16: 24CK2CAYPMD56ESD · pith_short_8: 24CK2CAY

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/24CK2CAYPMD56ESDVSNIJUWQFN \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4361bc8929ed15946dfaa36ee45ff40c2bf6be089daf81f3eef634102415532",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-04-12T16:42:04Z",
    "title_canon_sha256": "319938499e15ff76654f0fb2133dcb3d533a357a22dd90a1221d369e5a0adc6d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.06313",
    "kind": "arxiv",
    "version": 1
  }
}